Manufacture of chlorhydrin



UNITED STATES PATENT OFFICE.

comm, OI IIZDLAND, IIGHIGAH,

A CORPORATION OF MICHIGAN.

. IMF-Am OI 1,386,118. lam-swing.

To all whom it may concern:

Be it known that I, WILLIAM E. Kins-r, a citizen of the United States, and a resident of Lfidland, county of Lfidland, and State of Michigan, have invented a new and useful Improvement in the Manufacture of Chlorhydrin, of which the following is a specification, the rinciple of the invention being herein exp ained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other invenflong-- I r Eth lene chlorhvdrin, or glycol chlorhy drin zomoron on as it is preferably termed, is freely soluble in water, and one of the difliculties encountered in its manufacture on a commercial scale has been to eliminate the water necessarily present or resulting from the reactions by which the compound is formed. Whetherbecause of the closeness of the boiling point of the chlorhydrin to that of water, or other reason, such 0 lorhydrin seems extremely tenacious of the water, and the familiar method of fractional distillation has been found entirely inadequate in commercial practice. The present method, however, is based-on the discovery that by adding a medium that is soluble in chlorhydrin but insoluble in water, the mixture of such medium and water will boil off at a temperature at which. the combined vapor tensions of such liquids is equal to or greater than atmospheric, or other superimposed pressure, and this temperature will be sufiiciently below the boiling point of the chlorhydrin to enable a completeseparation of the water, as well as of the admixed compound to be efiected.

To the accomplishment of the foregoing and related ends, said invention, then, consists of the steps hereinafter fully described and particular y pointed out in the claims, the following description setting forth in detail one approved method of ca out the invention, such disclosed mode, however, constituting but one of the various ways in which the principle of theinvention ma be usted. 1 7 h a su stance suitab e for t e urpose in hand, I preferably employ benzol which is insoluble in water, bpt readily soluble in chlorhydrin. The combined vapor tensions Specification of Letters latent.

Application fled December 9, 1918. semi Io. 265,859.-

Patented Au 2, 1921.

of the water and benzol be greater thanatmospherlc pressure at a temperature jcon= siderablybelow the boiling point of the chlorhydrin, as well as considerably below the point of water alone. As a result the mixture of water and benzol will boil on,

upon the application of a proper temperature, and if a suflicient amount of benzol has been added the water may be removed to the very last trace, fectly dry. over will then readily distil off by itself.

The mingled vapors of water and benzol, driven off from the solution-mixture, will be received in a. suitable condenser, and the resulting liquid mixture collected and held in a chamber where the water will separate out, leaving the benzol to be used over again, as will be readily understood.

leaving the chlorhydrin per- Any excess of benzol remaining Other modes of applying the principle of my invention may be em loyed instead of the one explained, change being made as regards the method herein disclosed, provided the step or steps stated by any of the following claims or the equivalent of such stated step or steps be employed.

I therefore particularly point out and distinctly claim as my invention v 1. The method of removing water from a solution of the sameand which consists in adding benzol; and then raising the resulting solution-mixture to a temperature at which the combined vapor tensions of the benzol and water are e ual to or greater" than atmospheric or ot er superimposed pressure, thereby simultaneously evaporating the water and benzol and leavmg the chlorhydrin behind.

2. The method of removing water from a solution of the same and glycol chlorhydrin, which consists in adding benzol, raising the resulting solution-mixture to a temperature at which the combined vapor tensions of the benzol and water are equal to or greater than glycol chlorhydrin,- I

atmospheric or other superimposed pressure,

thereby simultaneously evaporating the.

water and benzol and leaving the chlorhydrin behind; condensing the mingled vapors of benzol and water thus driven ofl; and

separating the condensed benzol from the waterand using over again in the first step. 3. The method of removing water from a solution of the same and glycol halogen-hy-- v d .ously evaporating the water and benzol and leaving the halogen-hydrin behind.

drin, which consists in adding benzol an then raising the resulting solution-mixture to a temperature at which the combined 5 vapor tensions of the benzol and water are equal to or greater than atmospherieor other superimposed pressure, thereby simultaneigned by me, this 4th day of December, 10 19 8.

WILLIAM E. KIRST. 

